Dodder (Cuscuta spp.)-general infestations in seed alfalfa fields

pendimethalin (Prowl, Prowl H2O, Stealth)

Alfalfa for seed only

Rate 2 to 4 lb ai/A

Time Apply to established alfalfa between January 15 and April 30 but before dodder germinates.

Remarks Active special local needs labels include ID-140003 and OR-140006 for Prowl H2O. Besides dodder, treatment controls most annual grasses and certain broadleaf weeds as they germinate. Processed seed must be labeled "Not for human or animal consumption" at the processing plant, and all seed screenings must be disposed of in a way that they cannot be distributed or used for food or feed.

Caution Use only on alfalfa grown for seed. Do not apply to seedling alfalfa. Do not graze or harvest alfalfa for hay after application. Do not use screenings from seed processing as feed for livestock. Do not use harvested seed for sprouting.

Site of action Group 3: microtubule assembly inhibitor

Chemical family Dinitroaniline

pronamide (Kerb)

Rate 1 to 2 lb ai/A. Apply 1.5 to 2 lb ai/A in furrow-irrigated or rill-irrigated fields and 1 to 1.5 lb ai/A in flood-irrigated fields.

Time Apply in spring before dodder germinates. On furrow-irrigated fields, follow a shallow incorporation by irrigation within 7 days. On flood-irrigated fields, follow application by flooding within 1 to 3 days.

Remarks Field treatment seldom controls dodder 100%. Scout fields for dodder patches and spot treated them.

Caution A restricted-use herbicide. Pronamide controls grasses in alfalfa fields.

Site of action Group 3: microtubule assembly inhibitor

Chemical family Benzamide